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Article
Published: 2022-09-14

Two new Neotropical taxa of Radula Dumort. (Marchantiophyta: Radulaceae) with bordered leaves

Postgraduation Program in Biological Sciences – Tropical Botany (UFRA/MPEG), Museu Paraense Emílio Goeldi, Coordination of Botany, Av. Perimetral 1901, 66530-070 Belém, Brazil.
Museu Paraense Emílio Goeldi, Coordination of Botany, Av. Perimetral 1901, 66530-070 Belém, Brazil
Meise Botanic Garden, 1860 Meise, Belgium; Muséum National d’Histoire Naturelle, Institut de Systématique, Évolution, Biodiversité, 75005 Paris, France.
Liverworts Neotropics new species new variety Radula subg. Volutoradula taxonomy Bryophytes

Abstract

Radula pallens var. marginata and R. smithii (subg. Volutoradula) are newly described from montane forests of Venezuela and Peru, respectively. Both taxa stand out by the presence of bordered leaf lobes. The new variety differs from R. pallens var. pallens in its narrow leaf border of one row of colorless cells with bulging trigones, while R. smithii stands out by a broad, 3‒5 cell rows wide, reddish-brown border made up of evenly thick-walled cells. A broad, pigmented leaf border of evenly thick-walled cells is also found in R. ligula from Brazil and Argentina, and in R. marginata (subg. Amentuloradula), from New Zealand, but the latter two species have very different lobules and stem anatomy. A full description and illustration of the two new taxa as well as comments on morphology, taxonomy and distribution are provided.

References

  1. Castle, H. (1959) A revision of the genus Radula. Part II. Subgenus Acroradula. Section 4. Marginatae. Revue Bryologique et Lichénologique 28: 290–296.

  2. Devos, N., Renner, M.A.M., Gradstein, S.R., Shaw, A.J. & Vanderpoorten, A. (2011) Molecular data challenge traditional subgeneric divisions in the leafy liverwort Radula. Taxon 60: 1623–1632. https://doi.org/10.1002/tax.606007

  3. Dumortier, B.C.J. (1822) Commentationes Botanicae. Tournay, imprimerie de Ch. Casterman-Dieu.

  4. Dumortier, B.C.J. (1831) Sylloge Jungermannidearum Europae Indigenarum. Casterman, Tournay.

  5. Dumortier, B.C.J. (1835) Recueil d’Observations sur les Jungermanniacées. Blanquart, Tournay.

  6. Gottsche, C.M., Lindenberg, J.B.W. & Nees, C.G. (1845) Synopsis hepaticarum fasc. 2. Meissner, Hamburg, pp. 145–304.

  7. Gradstein, S.R. (2021) The Liverworts and Hornworts of Colombia and Ecuador. Memoirs of the New York Botanical Garden 121: 1–723.

  8. Gradstein, S.R., Churchill, S.P. & Salazar Allen, N. (2001) Guide to the Bryophytes of Tropical America. Memoirs of the New York Botanical Garden 86: 1–577.

  9. Gradstein, S.R. & Costa, D.P. (2003) The Hepaticae and Anthocerotae of Brazil. Memoirs of the New York Botanical Gar­den 87: 1–317.

  10. Gradstein, S.R. & Ilkiu-Borges, A.L. (2015) A taxonomic revision of the genus Odontoschisma (Marchantiophyta: Cephaloziaceae). Nova Hedwigia 100: 15–100. https://doi.org/10.1127/nova_hedwigia/2014/0219

  11. Grolle, R. (1970) Radula castlei sp. nov. und Anmerkungen zur Gattung Radula. The Bryologist 73 (4): 662–668.

  12. Gray, S.F. (1821) Natural arrangement of British plants. Vol. 1. Baldwin, Craddock, and Joy, London, 824 pp.

  13. Mägdefrau, K. (1983) The Bryophyte vegetation of the forests and Páramos of Venezuela and Colombia. Nova Hedwigia 38: 1–63.

  14. Mitten, W. (1861) Musci et hepaticae vitiensis. Bonplandia 9: 365–367.

  15. Mitten, W. (1864) A new genus of hepaticae. Journal of the Proceedings of the Linnean Society, Botany 7: 243–244.

  16. Montagne, J.F.C. (1839) Florula boliviensis. In: d’Orbigny, A. (Ed.) Voyage dans l’Amérique Méridionale. Tome Septième. Bertrand, Paris, 119 pp.

  17. Oliveira-da-Silva, F.R., Gradstein, S.R. & Ilkiu-Borges, A.L. (2021) The genus Radula Dumort. (Radulaceae, Machantiophyta) in Brazil. Nova Hedwigia 112: 69–163. https://doi.org/10.1127/nova_hedwigia/2020/0606

  18. Patiño, J., Renner, M.A.M., Gradstein, S.R., Laenen, B., Devos, N., Shaw, A.J., Vanderpoorten, A (2017) Integrative phylogeography of the liverwort genus Radula: A case of cretaceous vicariance in highly dispersive plants. Molecular Phylogenetics and Evolution 106: 73–85. http://dx.doi.org/10.1016/j.ympev.2016.09.020

  19. Paton, J.A. (1999) The liverwort Flora of the British Isles. Colchester, UK: Harley Books. 626 pp.

  20. Raddi, G. (1818) Jungermanniografia etrusca. Modena, 45 pp.

  21. Reiner-Drehwald, E. (1994) El género Radula Dum. (Radulaceae, Hepaticae) en el Noreste de Argentina. Tropical Bryology 9: 5–22.

  22. Renner, M.A.M. & Braggins, J.E (2004) The sterile gametophyte as a source of informative characters in the genus Radula (Radulaceae: Hepaticae). Nova Hedwigia 78: 243–268. https://doi.org/10.1127/0029-5035/2004/0078-0243

  23. Rostovzev, S.I. (1913) Morfologiya i Sistematika Pechenochnikov i Mkhov. I.N. Kushnerev, Moscow, 215 pp.

  24. Schultze-Motel, W. & Menzel, M. (1987) Die Lebermoosflora im BRYOTROP-Transekt von Peru. Beiheft zur Nova Hedwigia 88: 61–104.

  25. Schuster, R.M. (2000) Austral Hepaticae I. Nova Hedwigia Beiheft 118: 1–524.

  26. Schuster, R.M. (2002) Austral Hepaticae II. Nova Hedwigia Beiheft 119: 1–606.

  27. Spruce, R. (1885) Hepaticae Amazonicae et Andinae. Transactions and Proceedings of the Botanical Society of Edinburgh 15: 1–590.

  28. Stephani, F. (1910) Radula. Species Hepaticarum 4: 151–234.

  29. Swartz, O. (1788) Nova genera & species plantarum. M. Swederi, Stockholm, Upsala (Sweden), 158 pp.

  30. Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.-H., Li, D.-Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (2018) International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile 159. Glashütten: Koeltz Botanical Books. https://doi.org/10.12705/Code.2018

  31. Yamada, K. (1979) A revision of Asian taxa of Radula, Hepaticae. Journal of the Hattori Botanical Laboratory 45: 201–322.

  32. Yamada, K. (1990) Two new species of Radula from (Hepaticae) from Australia and Brazil. Journal of Japanese Botany 65: 1–6.